Have you ever had a BEAST of a time finding reference for something very very specific? Have you ever been unable to find a good reference for something, so you had to make it yourself? Share it here, for the benefit of others! I'll start with a couple of my own:
I've shared this before, I think-- I could NOT find a good reference image of the exact pose that I wanted, at the angle that I wanted. So I literally had to build a little mannequin and take photos to get the posing and angles and proportions right.
which gave me this:
And just tonight, I was trying to help a friend figure out a good reference for a brass object in a cyan light source. This was NOT easy to find... so I had to photograph it myself. Hopefully this helps someone else.
What have you got? What incredibly specific reference images did you have to create for yourself? Who knows, maybe they'll help someone else!